Sophie is one month older than Hazel and they are both spayed. Hazel is larger and heavier than Sophie though so I worry. I was hoping Hazel would learn from Sophie's good behavior but that was not to be. Perhaps if I had purchased Hazel at the same time I got Sophie things would have worked out better. Or if, as suggested, I had gotten a younger male but it was Hazel's sweet photo I fell for. I'll never know what might of been. Thanks again everyone. You all have made me feel a little better about the whole thing.